neither one nor four have ever existed and 2/3 are the same thing.
No, one has certainly existed in the past (and does exist in parts of the Third World). Not much fun if you're a prole, though.
I dare you to give one example. I would argue not only that no 100% unregulated capitalist states have existed, but also that none (that I'm aware of anyway) come even close enough to be accurately labelled as such.
I'll give you an example that I'm very familiar with.
There was no regulation of industry (or, bluntly, of almost anything else; urban issues being especially "fun") in Britain during the first few decades of industrialisation and no effective regulation until much later even than that. This is not opinion, this is fact. Now you can point to various things (almost all meaningless things) around the margins, enough to claim that it wasn't "100%" (whatever that means) but the basic point stands. It was unregulated, unfettered, unrestrained capitalism.